| 发明名称 |
Process of annealing BSCCO-2223 superconductors |
| 摘要 |
A method for preparing a BSCCO-2223 oxide superconducting article includes annealing an oxide superconductor article comprised of BSCCO-2223 oxide superconductor at a temperature selected from the range of about 500 DEG C.</=T</=787 DEG C. and an annealing atmosphere having an oxygen pressure selected from within the region having a lower bound defined by the equation, PO2(lower)>/=3.5x1010exp(-32,000/T+273) and an upper bound defined by the equation, PO2(upper)</=1.1x1012exp(-32,000/T+273). The article is annealed for a time sufficient to provide at least a 10% increase in critical current density as compared to the critical current density of the pre-anneal oxide superconductor article. An oxide superconductor having the formula Bi2-yPbySr2Ca2Cu3O10+x, where 0</=x</=1.5 and where 0</=y</=0.6 is obtained, the oxide superconductor characterized by a critical transition temperature of greater than 111.0K, as determined by four point probe method.
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| 申请公布号 |
US5661114(A) |
申请公布日期 |
1997.08.26 |
| 申请号 |
US19940198912 |
申请日期 |
1994.02.17 |
| 申请人 |
AMERICAN SUPERCONDUCTOR CORPORATION |
发明人 |
OTTO, ALEXANDER;RILEY, JR., GILBERT N.;CARTER, WILLIAM L. |
| 分类号 |
C04B35/45;C01G1/00;C01G3/00;C01G29/00;H01B12/02;H01B13/00;H01L39/24;(IPC1-7):H01B12/00;H01L39/12;C04B35/64 |
主分类号 |
C04B35/45 |
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